Insubres

The Insubres were a Gallic people that inhabited northern Italy during the 3rd century BC. With their capital at Medhlan (Milan), the Insubres made forays into Liguria and attacked Rome's ally, Senorix of Liguria, in 263 BC. Their siege of Genua was lifted when the Roman general Lucius Julius Libo led an army to drive them out, and Caletios, their king, was killed in battle. They were fully subjugated in 260 BC when Rome captured Medhlan from their forces, and they were incorporated into Cisalpine Gaul.

History
The Insubres were a fusion of Etruscan, Italic, Ligurian, and Celtic peoples, and were among the Gaul tribes of northern Italy. They co-existed with the Umbrians and Senones, among other Gaulish tribes, and the Insubres founded their capital at Medhlan (Milan). The Insubres' kingdom was in the Alps (Cisalpina), but they were expansionist against their immediate neighbors, Liguria. The Insubres king Caletios besieged Liguria's capital Genua in 263 BC, but Roman intervention pushed them back to their homes. Lucius Julius Libo, the Roman general, refused to let them continue their attacks and they attacked Caletios' tired army near Medhlan. The Romans decisively defeated him at the Battle of Medhlan in 260 BC, and the Roman army conquered their capital later that year. The Insubres tribe were destroyed and they became a part of Cisalpine Gaul, a Roman province.